public static SizeF PreferredSize(ILayoutable view, SizeF bounds)
{
var layout = new LayoutBuilder(new RectangleF(PointF.Empty, bounds));
view.OnLayout(layout);
return(layout.PreferredSize);
}
public sealed override void LayoutSubviews()
{
var layoutBuilder = new LayoutBuilder((RectangleF)Bounds);
OnLayout(layoutBuilder);
foreach (var box in layoutBuilder.Views)
{
box.Layout();
}
}
public override void LayoutSubviews()
{
base.LayoutSubviews();
var layout = new LayoutBuilder((RectangleF)Bounds);
OnLayout(layout);
foreach (var v in layout.Views)
{
v.Layout();
}
}
protected sealed override void OnLayout(bool changed, int l, int t, int r, int b)
{
//var rect = new RectangleF(PaddingLeft, PaddingTop, r - l - PaddingRight, b - t - PaddingBottom);
var rect = new RectangleF(0, 0, r - l, b - t);
var layoutBuilder = new LayoutBuilder(rect);
OnLayout(layoutBuilder);
foreach (var box in layoutBuilder.Views)
{
box.Layout();
}
}
protected override void OnLayout(LayoutBuilder layout)
{
layout.View(ImageView)
.Top(0).Bottom(0).Left(0).Right(0);
if (Indicator != null)
{
layout.View(Indicator)
.CenterVertically()
.CenterHorizontally()
.AutoSize();
}
}
public static void Distribute(this LayoutBuilder layout, RectangleF bounds, DistributionDirection direction,
params PlatformView[] views)
{
if (direction == DistributionDirection.Horizontal)
{
layout.DistributeHorizontally(bounds, views);
}
else
{
layout.DistributeVertically(bounds, views);
}
}
public sealed override void LayoutSubviews()
{
var layoutBuilder = new LayoutBuilder((RectangleF)Bounds);
layoutBuilder.Padding = new EdgeInsets(Padding.Left,
Padding.Top,
Padding.Right,
Padding.Bottom);
OnLayout(layoutBuilder);
foreach (var box in layoutBuilder.Views)
{
box.Layout();
}
}
public LinearLayoutBuilder(LayoutBuilder layoutBuilder, LinearLayoutDirection layoutDirection, LinearLayoutDirection?flowDirection = null, RectangleF?bounds = null)
{
Assert.Argument(layoutBuilder, nameof(layoutBuilder)).NotNull();
flowDirection = flowDirection ?? DefaultFlowDirection(layoutDirection);
_layoutBuilder = layoutBuilder;
_maxSize = 0;
var layoutBounds = bounds ?? _layoutBuilder.OuterBounds;
_layoutBounds = new RectangleF(layoutBounds.Location, SizeF.Empty);
_layoutToView = LayoutTransform(layoutBounds, layoutDirection, flowDirection.Value);
_viewToLayout = _layoutToView.Inverted();
_layoutSpaceBounds = _viewToLayout.Transform(layoutBounds);
_layoutOrigin = _layoutSpaceBounds.Location;
}
public virtual System.Drawing.SizeF SizeThatFits(System.Drawing.SizeF bounds)
{
var layoutBuilder = new LayoutBuilder(new RectangleF(PointF.Empty, bounds));
OnLayout(layoutBuilder);
int l = int.MaxValue, t = int.MaxValue, r = int.MinValue, b = int.MinValue;
foreach (var v in layoutBuilder.Views)
{
l = (int)Math.Round(Math.Min(v.LayoutLeft, l));
r = (int)Math.Round(Math.Max(v.LayoutRight, r));
t = (int)Math.Round(Math.Min(v.LayoutTop, t));
b = (int)Math.Round(Math.Max(v.LayoutBottom, b));
}
return(new System.Drawing.SizeF(Math.Abs(r - l), Math.Abs(b - t)));
}
public static void DistributeVertically(this LayoutBuilder layout, RectangleF bounds,
params PlatformView[] views)
{
var viewBoxes = views.Select(x => layout.View(x)).ToArray();
var totalWidth = viewBoxes.Sum(x => x.Height);
if (totalWidth > bounds.Height || views.Length < 2)
{
return;
}
var dx = (bounds.Height - totalWidth) / (views.Length - 1);
var xCoord = 0f;
foreach (var v in viewBoxes)
{
v.Top(xCoord).Height(v.Height);
xCoord += (dx + v.Height);
}
}
public static SizeF SizeThatFits(ILayoutable view, SizeF bounds)
{
var layout = new LayoutBuilder(new RectangleF(PointF.Empty, bounds));
view.OnLayout(layout);
float l = int.MaxValue, t = int.MaxValue, r = int.MinValue, b = int.MinValue;
foreach (var v in layout.Views)
{
var frame = v.LayoutBounds;
l = Math.Min(frame.Left, l);
r = Math.Max(frame.Right, r);
t = Math.Min(frame.Top, t);
b = Math.Max(frame.Bottom, b);
}
// Top and Left padings already assumed by 'r' and 'b' coordinates
// since layout performed in padded rectangle.
return(new SizeF((float)(r + layout.Padding.Right),
(float)(b + layout.Padding.Bottom)));
}
protected virtual void OnLayout(LayoutBuilder layout)
{
}
void ILayoutable.OnLayout(LayoutBuilder layout)
{
OnLayout(layout);
}
public static void DistributeVertically(this LayoutBuilder layout, params PlatformView[] views)
{
layout.DistributeVertically(layout.PaddedOuterBounds, views);
}
